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   1  <?php
   2  
   3  class PaddingSideValue {
   4    var $value;
   5    var $auto;
   6    var $percentage;
   7  
   8    function copy() {
   9      $value = new MarginSideValue;
  10      $value->value      = $this->value;
  11      $value->auto       = $this->auto;
  12      $value->percentage = $this->percentage;
  13      return $value;
  14    }
  15  
  16    function is_default() {
  17      return 
  18        $this->value == 0 &&
  19        !$this->auto &&
  20        !$this->percentage;
  21    }
  22  
  23    function init($data) {
  24      $value = new PaddingSideValue;
  25      $value->value      = $data;
  26      $value->percentage = $data{strlen($data)-1} === '%' ? (int)($data) : null;
  27      $value->auto       = $data === 'auto';
  28      return $value;
  29    }
  30  
  31    function units2pt($base) {
  32      $this->value = units2pt($this->value, $base);
  33    }
  34  }
  35  
  36  class PaddingValue {
  37    var $top;
  38    var $bottom;
  39    var $left;
  40    var $right;
  41  
  42    function copy() {
  43      $value = new PaddingValue;
  44      $value->top    = $this->top->copy();
  45      $value->bottom = $this->bottom->copy();
  46      $value->left   = $this->left->copy();
  47      $value->right  = $this->right->copy();
  48      return $value;
  49    }
  50  
  51    function is_default() {
  52      return 
  53        $this->left->is_default() &&
  54        $this->right->is_default() &&
  55        $this->top->is_default() &&
  56        $this->bottom->is_default();
  57    }
  58  
  59    function init($data) {
  60      $value = new PaddingValue;
  61      $value->top    = PaddingSideValue::init($data[0]);
  62      $value->right  = PaddingSideValue::init($data[1]);
  63      $value->bottom = PaddingSideValue::init($data[2]);
  64      $value->left   = PaddingSideValue::init($data[3]);
  65      return $value;
  66    }
  67  
  68    function units2pt($base) {
  69      $this->top->units2pt($base);
  70      $this->bottom->units2pt($base);
  71      $this->left->units2pt($base);
  72      $this->right->units2pt($base);
  73    }
  74  }
  75  
  76  class CSSPadding extends CSSProperty {
  77    var $default_value;
  78  
  79    function CSSPadding() { 
  80      $this->default_value = $this->parse("0");
  81      $this->CSSProperty(false, false); 
  82    }
  83  
  84    function default_value() { return $this->default_value->copy(); }
  85  
  86    function parse_in($value) {
  87      $values = explode(" ",trim($value));
  88      switch (count($values)) {
  89      case 1:
  90        $v1 = $values[0];
  91        return array($v1, $v1, $v1, $v1);
  92      case 2:
  93        $v1 = $values[0];
  94        $v2 = $values[1];
  95        return array($v1, $v2, $v1, $v2);
  96      case 3:
  97        $v1 = $values[0];
  98        $v2 = $values[1];
  99        $v3 = $values[2];
 100        return array($v1, $v2, $v3, $v2);
 101      case 4:
 102        $v1 = $values[0];
 103        $v2 = $values[1];
 104        $v3 = $values[2];
 105        $v4 = $values[3];
 106        return array($v1, $v2, $v3, $v4);
 107      default:
 108        // We newer should get there, because 'padding' value can contain from 1 to 4 widths

 109        return "";
 110      };
 111    }
 112  
 113    function parse($string) {
 114      return PaddingValue::init($this->parse_in($string));
 115    }
 116  }
 117     
 118  class CSSPaddingTop extends CSSSubProperty {
 119    function parse($value) { return PaddingSideValue::init($value); }
 120  }
 121  
 122  class CSSPaddingRight extends CSSSubProperty {
 123    function parse($value) { return PaddingSideValue::init($value); }
 124  }
 125  
 126  class CSSPaddingLeft extends CSSSubProperty {
 127    function parse($value) { return PaddingSideValue::init($value); }
 128  }
 129  
 130  class CSSPaddingBottom extends CSSSubProperty {
 131    function parse($value) { return PaddingSideValue::init($value); }
 132  }
 133  
 134  $ph = new CSSPadding;
 135  register_css_property('padding'       ,$ph);
 136  register_css_property('padding-left'  ,new CSSPaddingLeft($ph,   'left'));
 137  register_css_property('padding-right' ,new CSSPaddingRight($ph,  'right'));
 138  register_css_property('padding-top'   ,new CSSPaddingTop($ph,    'top'));
 139  register_css_property('padding-bottom',new CSSPaddingBottom($ph, 'bottom'));
 140  
 141  ?>